GOS2 Eye Test:
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Understanding the GOS2 Patient's Optical Prescription Or Statement Form:

Part 1 - This section of the form is meant to capture the patient's details and includes the patient's Title, Surname, Previous Surname, First Name, Date of Birth, Full Address, NHS Number, National Insurance Number and Date of the Test.

Part 2 - The 1st section of this part of the form is meant to show what action was taken after the test was completed and what type of voucher was issued, if any.

Part 2 - This 2nd section of this part of the form is meant to capture the test results of the Distance and Near vision of both the Right and the Left eye and includes details on Sph, Cyl, Axis, Prism and Base; details will only be entered in the relevant boxes.

Sph - The Sphere Power of your prescription, is used to measure the power in your lens, which compensates for Myopia 'Short Sightedness' or Hyperopia 'Long Sightedness; if the power has a (-) sign next to it, then you are short sighted and if the power has a (+) sign after it, then you are long sighted; the power starts at 0.00, which means that no power is required and it increases in increments of 0.25, so the higher the figure, the stronger the lens required.

Cyl Power - This power corrects Astigmatism, a condition which around one in three of us suffer from; this power is worked into the lens to stretch an image across an axis, which corrects a defect within the cornea or crystalline lens within the eye; this power increases in increments of 0.25 and if you do not require a Cyl power, nothing will be written on this part of the prescription.

Axis - This is simply an angle at which the Cyl power of your lens sits; this angle is measured in degrees, from 1 degree to 180 degrees; this angle is the opposite of an imperfection in your eye caused by Astigmatism; if you do not require an Axis, nothing will be written on this part of the prescription.

Prism - Prismatic power is prescribed for numerous reasons; sometimes it is prescribed when a patient has a medical condition which means that they cannot tolerate small distortions within their peripheral vision, which can be caused by wearing spectacles; sometimes a prism is prescribed to correct problems with the angle at which the crystalline lens within the eye sits, or a problem with an implant; Prisms are prescribed in a measurement called prismatic dioptres which run from 1 to 6; if you do not require a Prism, nothing will be written on this part of the prescription.

Base - The base is simply the direction from the pupil, at which the prism sits, so the base can be set as UP, DOWN, LEFT or RIGHT.

Part 2 - This 3rd section of this part of the form is meant to capture any additional comments made by the Tester who has tested your eyes; this can often be left empty.

Part 2 - This 4th section of this part of the form is meant to capture the details of the Tester who has tested your eyes and includes the Tester's Signature, the Date of the Test, the Tester's List number and the Test Centre's Name & Address.


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